Cam mechanism.



W. SPARKS.

CAM MECHANISM.

APPLICATION FILED NOV. 6. I914.

Patented Oct. 2, 1917.

UNITED srarns PATENT onnrcn.

WILLIAM SPARKS, QF JACKSON, MICHIGAN, ASSIGNOR TO THE SPARKS-\VITHINGTON GOMTANY, A CORPORATION OFOHIO.

CAM MECHANISM.

Specification of Letters Patent.

Patented Oct. 2, 1917.

Application filed November 6, 1914. Serial 110,870,649,

ings, is a full, clear, and exact description.

This invention relates to certain improvements in cam mechanisms, and more particularly to a new and improved construction of cam or rotary actuator designed particularly for use in connection with signals.

The object of the invention is to pro duce a cam of pressed sheet metal in which the actuating teeth gradually widen and increase in altitude as they extend out-- wardly toward the circumference of the disk so that by lateral movement of the cam relative to a diaphragm wear-piece increased amplitude of vibration may be produced without increasing the rapidity of vibration, constituting an e cient adjustment means, and reference is hereby made to my co-pending application, Serial No.

54,737, filed October 8, 1915.

Other advantages will appear from the following description, taken in connection with the accompanying drawings, in

which- Figure l is a sideelevation of the cam illustrating it in connection with a portion of a diaphragm embodying an adjustable wear-piece.

Fig. 2 is a front elevation of the cam.

Fig. 3 is a central cross section through the cam. i

.In Fig. 1, I have disclosed the cam in connection with a diaphragm 1- and adiustable wear-piece formed by the projecting end of an externally threaded screw 3 having a threaded relation with an interiorly threaded sleeve; ,4 having a split portion 5- 'frictton'ally gripping;

the screw and tending to prevent rotary movement of the same. Other forms of wear-piece may be utilized.

The cam -6 is shown as mounted 'upon a shaft 7-, which may be the armature shaft of an electric motor, and is formedfrom a single disk of sheet metal, preferably circular in form, and having a central opening for the passage of the shaft.

Portions of the sheet metal disk, pref erably along substantially radial lines, are pressed up to form teeth 8, which teeth increase in width and altitudeas they extend outwardly from the central opening 9- and-have their maximum throw at the circumference of the disk. As is shown, the teeth are pressed or oilset entirely to one side of the plane of the disk.

It is obvious that various changes may be made in the details of formation and construction of the cam without departing from the spirit of this invention as set forth in the appended claims.

' What I claim is:v

An article of the class described formed of a substantially circular sheet metal disk and having a substantially flat central portion and radially extending teeth struck up therefrom and projecting wholly to one side of the flat central portion, thereby forming a series of radial recesses in one- WILLIAM SPARKS. Witnesses LILLIAN WUNnnRLIoi-i,

W. B. PATCH.

copies of thispetent may be obtained for five cents each, by addressing the {fcmmicziuncr er Petunia, Washington, X2. ii. 

